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arXiv 1010.6063cond-mat.supr-con
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超导共面波导谐振器损耗的研究

Study of loss in superconducting coplanar waveguide resonators

Jeremy M. Sage, Vladimir Bolkhovsky, William D. Oliver, Benjamin Turek, Paul B. Welander

摘要:

超导共面波导(SCPW)谐振器由于其平面几何结构和相对于普通金属的高品质因数而具有广泛的应用。然而,它们的性能对它们的几何形状的细节以及它们的制造中使用的材料和工艺都很敏感。在本文中,我们研究了SCPW谐振器的性能依赖于材料和几何形状的温度和激励功率的函数。我们测量的品质因数大于$2\times10^6$在高激发功率和$6\times10^5$的功率相当于由一个单一的微波光子在谐振器中循环产生的。我们研究的限制,谐振器的高激发功率性能,并发现它是一致的辐射损耗的模型。我们进一步观察到,虽然在所有情况下,随着温度和功率由于介电损耗而降低,品质因数劣化,但是这种效应的大小取决于谐振器材料和几何形状。最后,我们证明,介电损耗可以控制在原则上使用一个单独的激励附近的谐振器的谐振频率。

英文摘要:

Superconducting coplanar waveguide (SCPW) resonators have a wide range of applications due to the combination of their planar geometry and high quality factors relative to normal metals. However, their performance is sensitive to both the details of their geometry and the materials and processes that are used in their fabrication. In this paper, we study the dependence of SCPW resonator performance on materials and geometry as a function of temperature and excitation power. We measure quality factors greater than $2\times10^6$ at high excitation power and $6\times10^5$ at a power comparable to that generated by a single microwave photon circulating in the resonator. We examine the limits to the high excitation power performance of the resonators and find it to be consistent with a model of radiation loss. We further observe that while in all cases the quality factors are degraded as the temperature and power are reduced due to dielectric loss, the size of this effect is dependent on resonator materials and geometry. Finally, we demonstrate that the dielectric loss can be controlled in principle using a separate excitation near the resonance frequencies of the resonator.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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